diff --git a/headers/private/kernel/string.h b/headers/private/kernel/string.h
new file mode 100644
index 0000000000..9af4e94157
--- /dev/null
+++ b/headers/private/kernel/string.h
@@ -0,0 +1,18 @@
+/*
+ * Copyright 2026, Haiku, Inc. All rights reserved.
+ * Distributed under the terms of the MIT License.
+ */
+#ifndef KERNEL_STRING_H
+#define KERNEL_STRING_H
+
+
+#include_next <string.h>
+
+
+#define memset(DEST, V, LEN)	__builtin_memset((DEST), (V), (LEN))
+#define memcpy(DEST, SRC, LEN)	__builtin_memcpy((DEST), (SRC), (LEN))
+#define memmove(DEST, SRC, LEN)	__builtin_memmove((DEST), (SRC), (LEN))
+#define memcmp(B1, B2, LEN)		__builtin_memcmp((B1), (B2), (LEN))
+
+
+#endif	/* KERNEL_STRING_H */
diff --git a/src/system/libroot/posix/musl/string/memmove.c b/src/system/libroot/posix/musl/string/memmove.c
index 5e025fd9a2..636b4dc859 100644
--- a/src/system/libroot/posix/musl/string/memmove.c
+++ b/src/system/libroot/posix/musl/string/memmove.c
@@ -1,5 +1,6 @@
 #include <string.h>
 #include <stdint.h>
+#undef memmove
 
 #if defined(__GNUC__) && __GNUC__ >= 4
 typedef __attribute__((__may_alias__)) size_t WT;
diff --git a/src/system/libroot/posix/string/arch/generic/generic_memcpy.c b/src/system/libroot/posix/string/arch/generic/generic_memcpy.c
index 61d8fabddc..5ef7977b0d 100644
--- a/src/system/libroot/posix/string/arch/generic/generic_memcpy.c
+++ b/src/system/libroot/posix/string/arch/generic/generic_memcpy.c
@@ -6,6 +6,7 @@
 
 #include <stdint.h>
 #include <string.h>
+#undef memcpy
 
 
 #define MISALIGNMENT(PTR, TYPE) ((addr_t)(PTR) & (sizeof(TYPE) - 1))
diff --git a/src/system/libroot/posix/string/arch/generic/generic_memset.c b/src/system/libroot/posix/string/arch/generic/generic_memset.c
index 57874003d9..9896c2ce1c 100644
--- a/src/system/libroot/posix/string/arch/generic/generic_memset.c
+++ b/src/system/libroot/posix/string/arch/generic/generic_memset.c
@@ -6,6 +6,7 @@
 
 #include <stdint.h>
 #include <string.h>
+#undef memset
 
 
 #define MISALIGNMENT(PTR, TYPE) ((addr_t)(PTR) & (sizeof(TYPE) - 1))
diff --git a/src/system/libroot/posix/string/memcmp.c b/src/system/libroot/posix/string/memcmp.c
index 71d0cf98e4..f732d3482b 100644
--- a/src/system/libroot/posix/string/memcmp.c
+++ b/src/system/libroot/posix/string/memcmp.c
@@ -7,6 +7,7 @@
 
 #include <stdint.h>
 #include <string.h>
+#undef memcmp
 
 
 #define MISALIGNMENT(PTR, TYPE) ((addr_t)(PTR) & (sizeof(TYPE) - 1))